Question

A mover drags a 10 kg trunk along a ramp inclined at 20° to the horizontal by applying a force of 200 N at an angle of 30° above the incline. If the force of frictional resistance acting on the trunk is 125 N, determine the acceleration of the trunk.

Answer 1

$$ma=F\cos{30}-mg \sin{20}-F_f$$

$$10a=200\cos{30}-10(9.8)\sin{20}-125$$

$$a=1.5\frac{m}{s^2}$$